LEGAZPI CITY, Philippines – Thousands of people have evacuated regions surrounding the Mayon Volcano in the Philippines as the mountain continues to spew lava and show increasing signs of unrest.

Avalanches of ash, gas and rock that cascade downhill during volcanic eruptions may be even more dangerous than scientists had realized. Pulses of high pressure form within these slides, known as ...

Filipinos pondered if they should move to shelters. Some lived along riverbeds where deadly pyroclastic flows and thick mud streams called lahars would roll down from the mountainside at high speeds, ...

Pyroclastic density currents (PDCs) represent some of the most formidable and complex volcanic phenomena, characterised by a turbulent mixture of solid particles and gases that surge down slopes at ...

When a volcano erupts explosively, molten rock bubbles upward at the speed of sound, forming glass-like rocks that shoot out of the earth as fast as a speeding bullet (literally). But not all volcanic ...

When a colossal plume of ash and lava exploded from Mount Pinatubo in the Philippines in 1991, few people probably had their minds on the animal life in the area, much less one species of rodent. The ...